It is displayed in the field of Advanced Technology, product and Solutions. In addition to laser products and 4K products, large-screen display is a major protagonist in the exhibition. Large-screen display technology has DLP, LCD LCD and plasma PDP three categories. In addition, the black and the splash screen LCD large screen display wall processing is a common problem.

The large-screen display technology

DLP is mainly used in LED display splicing, is the light emitted by the lamp through a color wheel light into RGB primary colors, then the color projected by the lens on the DMD chip; method to synchronize signals, digital micro mirror wafer telecommunications numbers, the continuous light into gray scale, with the R, G, B three colors and the color shown, and finally through the projection lens reflex image on the projection screen. LED display with high precision, can fine image color reproduction, which allows the transmitter DMD DLP display system more efficient, in addition to the rear due to multi-mode, you can make the image 100% projection screen, so the gap between the screen less than 05mm, called seamless. LED display life of up to hundreds of thousands of hours.

LCD display for a liquid crystal display technology, and its working principle is: the liquid crystal layer in the droplets are included in the small cell structure, one or more cells constitute a pixel on the screen. Between glass plates and the liquid crystal material is a transparent electrode, an electrode is divided into the intersection of rows and columns, row and column, by changing the voltage change of the optical state of the liquid crystal, the liquid crystal material is similar to the role of a small light valve. In the liquid crystal material was surrounding a control circuit portion and a driver circuit portion. When the LCD of the electrode generating an electric field, the liquid crystal molecules will be twisted, so that the light rays which pass through regular refraction, the second layer is then filtered through the filter layer is displayed on the screen. LCD splicing is the development of the most widely used and most promising, now mainly devoted to shrink the size of the seams.

LCD is a mosaic technique was developed in recent years, its biggest advantage is that it has low power consumption, light weight, long life, no radiation, screen brightness uniformity, etc., but LCD biggest defect is the larger splicing. It is unable to compete with DLP that only has tenths of a millimeter splice. This is also a key factor in the LCD splicing only the low-end market occupation. To reduce the splice, splice reduction gives users a sense of space, liquid crystal mosaic manufacturer’s work hard for that. In recent years, liquid crystal mosaic patchwork unit, and then in 2011 launched a new 5.5 mm LCD splicing unit, continuous breakthroughs in terms of the initial patchwork 7.3mm, then 6.7mm,, set off again and again LCD Video tide.

Plasma PDP is a use of gas discharge display technology, the use of plasma tube as a light emitting element, each plasma tube on the screen corresponds to one pixel, the screen to the glass as the inter-substrate, and the substrate has a certain distance, surrounded by the airtight seal forming a discharge space. A space filled with neon, xenon and other inert gas as the mixed medium. The inner surface of two glass substrates coated with a metal oxide conductive film as the excitation electrode. When added to the electrode voltage, the mixed gas in the discharge space has a plasma discharge phenomenon. Gas plasma discharge generates ultraviolet rays, ultraviolet rays excite the phosphor screen, and the phosphor screen emits visible light to display an image. When using the three primary colors phosphor-coated screen, UV excitation screen, the light emitted by the screen is red, green, and blue. As each primary unit after achieving 256 gray colors mixing, they achieve color display. There are some shortcomings in PDP technology; so the development is not very good.